/*
	tabinit.c: initialize tables...

	copyright ?-2008 by the mpg123 project - free software under the terms of the LGPL 2.1
	see COPYING and AUTHORS files in distribution or http://mpg123.org
	initially written by Michael Hipp
*/

#include "mpg123lib_intern.h"

static real cos64[16] = {
	8398725,8480395,8647771,8909416,9279544,9780026,10443886,11321405,
	12491246,14081950,16316987,19619946,24900150,34523836,57170182,170959967
};
static real cos32[8] = {
	8429197,8766072,9511743,10851869,13223040,17795219,28897867,85583072
};
static real cos16[4] = {
	8552951,10088893,15099095,42998586
};
static real cos8[2] = {
	9079764,21920489
};
static real cos4[1] = {
	11863283
};

real *pnts[] = { cos64,cos32,cos16,cos8,cos4 };

static long intwinbase[] = {
     0,    -1,    -1,    -1,    -1,    -1,    -1,    -2,    -2,    -2,
    -2,    -3,    -3,    -4,    -4,    -5,    -5,    -6,    -7,    -7,
    -8,    -9,   -10,   -11,   -13,   -14,   -16,   -17,   -19,   -21,
   -24,   -26,   -29,   -31,   -35,   -38,   -41,   -45,   -49,   -53,
   -58,   -63,   -68,   -73,   -79,   -85,   -91,   -97,  -104,  -111,
  -117,  -125,  -132,  -139,  -147,  -154,  -161,  -169,  -176,  -183,
  -190,  -196,  -202,  -208,  -213,  -218,  -222,  -225,  -227,  -228,
  -228,  -227,  -224,  -221,  -215,  -208,  -200,  -189,  -177,  -163,
  -146,  -127,  -106,   -83,   -57,   -29,     2,    36,    72,   111,
   153,   197,   244,   294,   347,   401,   459,   519,   581,   645,
   711,   779,   848,   919,   991,  1064,  1137,  1210,  1283,  1356,
  1428,  1498,  1567,  1634,  1698,  1759,  1817,  1870,  1919,  1962,
  2001,  2032,  2057,  2075,  2085,  2087,  2080,  2063,  2037,  2000,
  1952,  1893,  1822,  1739,  1644,  1535,  1414,  1280,  1131,   970,
   794,   605,   402,   185,   -45,  -288,  -545,  -814, -1095, -1388,
 -1692, -2006, -2330, -2663, -3004, -3351, -3705, -4063, -4425, -4788,
 -5153, -5517, -5879, -6237, -6589, -6935, -7271, -7597, -7910, -8209,
 -8491, -8755, -8998, -9219, -9416, -9585, -9727, -9838, -9916, -9959,
 -9966, -9935, -9863, -9750, -9592, -9389, -9139, -8840, -8492, -8092,
 -7640, -7134, -6574, -5959, -5288, -4561, -3776, -2935, -2037, -1082,
   -70,   998,  2122,  3300,  4533,  5818,  7154,  8540,  9975, 11455,
 12980, 14548, 16155, 17799, 19478, 21189, 22929, 24694, 26482, 28289,
 30112, 31947, 33791, 35640, 37489, 39336, 41176, 43006, 44821, 46617,
 48390, 50137, 51853, 53534, 55178, 56778, 58333, 59838, 61289, 62684,
 64019, 65290, 66494, 67629, 68692, 69679, 70590, 71420, 72169, 72835,
 73415, 73908, 74313, 74630, 74856, 74992, 75038 };

void prepare_decode_tables(){
}

void make_decode_tables(mpg123_handle *fr){
	int i,j;
	int idx = 0;
	/* Scale is always based on 1.0 . */
	double scaleval = -0.5*(fr->lastscale < 0 ? fr->p.outscale : fr->lastscale);
	long scaleval_long = DOUBLE_TO_REAL_15(scaleval);
	for(i=0,j=0;i<256;i++,j++,idx+=32){
		if(idx < 512+16)
		fr->decwin[idx+16] = fr->decwin[idx] = REAL_SCALE_WINDOW(intwinbase[j] * scaleval_long);

		if(i % 32 == 31)
		idx -= 1023;
		if(i % 64 == 63)
		scaleval_long = - scaleval_long;
	}

	for( /* i=256 */ ;i<512;i++,j--,idx+=32) {
		if(idx < 512+16)
		fr->decwin[idx+16] = fr->decwin[idx] = REAL_SCALE_WINDOW(intwinbase[j] * scaleval_long);

		if(i % 32 == 31)
		idx -= 1023;
		if(i % 64 == 63)
		scaleval_long = - scaleval_long;
	}
	if (fr->cpu_type == arm)	{ /* for float SSE / AltiVec / ARM decoder */
		for(i=512; i<512+32; i++) {
			fr->decwin[i] = (i&1) ? fr->decwin[i] : 0;
		}
		for(i=0; i<512; i++) {
			fr->decwin[512+32+i] = -fr->decwin[511-i];
		}
	}
}

